Sierra is a discourse analyst interested in language and social interaction. She takes an interactional sociolinguistic approach to exploring knowledge management and identity construction in everyday conversation in both face-to-face and online contexts. Her research interests include identity, popular culture/media, knowledge management, social media, multimodal methods/embodied interaction, discourse-level sociolinguistic variation, and Mexican Spanish culture.

Sierra’s first book, , is scheduled for release in October 2021. The book focuses on how and why millennials quote a wide array of media in everyday talk, including films, tv shows, video games, memes, songs, and books. Sierra looks at the interrelationship between intertextuality, framing, epistemics and identity by analyzing actual everyday conversations among millennials which contain references to both old and new popular culture.

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